jeff bush is live. >> reporter: wean just a little bit about -- we know just a little bit about this incident. to my right is the twin peaks overlook, where you can see san francisco from twin peaks. a driver hit four people, knocking one of them 30 feet down this steep ravine. the fire department had to rescue that person. she went to the hospital with life-threatening injuries. a suspect was arrested a short time after, not too far away from this situation. four people were in that vehicle. we're not sure if drugs or alcohol were involved. but there has been an arrest. four people were hit. two people with nonlife-threatening injuries, two people with life-threatening injuries. more on this story as we get more developments. live in san francisco, kron4 news. >>> major charge s underway in curry village at yosemite national park where the hantavirus outbreak started in the summer. >> 10 people got sick from the hantavirus. three eventually died. park officials decided to demolish some of the tent cabins where it's believed the victims were infected by the disease. park officials be